ST 99 Sb/main ST over Rr Mbta/bmrr/csx
Fair Condition72 years old42,000 vehicles/day
Location
| State | Massachusetts |
| County | Middlesex |
| Location | 30 M S Of Jct Sr16&sr99 |
| Carries | ST 99 Sb/main ST |
| Crosses | Rr Mbta/bmrr/csx |
| Coordinates | 42.40159, -71.06096 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 5 (Fair) |
| Superstructure | 5 (Fair) |
| Substructure | 5 (Fair) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 128.9 ft (39.3 m) |
| Max Span | 85.0 ft (25.9 m) |
| Deck Width | 50.9 ft (15.5 m) |
| Deck Area | 609.1 sq m |
| Main Spans | 1 |
| Year Built | 1954 |
Traffic
| Avg Daily Traffic | 42,000 (2024) |
| Truck Traffic | 12% |
| Lanes On Bridge | 3 |
Inspection & Ownership
| Last Inspection | 824 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | E120013GHDOT634 |